package com.huangzhao.gulimall.auth.controller;

import cn.hutool.core.map.MapUtil;
import cn.hutool.core.util.NumberUtil;
import cn.hutool.core.util.RandomUtil;
import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.TypeReference;
import com.huangzhao.gulimall.auth.feign.MemberFeignService;
import com.huangzhao.gulimall.auth.feign.ThirdPartFeignService;
import com.huangzhao.gulimall.auth.vo.UserLoginVo;
import com.huangzhao.gulimall.auth.vo.UserRegisterVo;
import com.huangzhao.gulimall.common.constant.AuthServerConstant;
import com.huangzhao.gulimall.common.exception.BizCodeEnum;
import com.huangzhao.gulimall.common.utils.R;
import com.huangzhao.gulimall.common.vo.MemberResponseVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import static com.huangzhao.gulimall.common.constant.AuthServerConstant.LOGIN_USER;

/**
 * @author huangzhao
 */
@Controller
public class LoginController {
    @Autowired
    private ThirdPartFeignService thirdPartFeignService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private MemberFeignService memberFeignService;

    @RequestMapping(value = "/login.html")
    public String loginPage(HttpSession session) {
        //从session先取出来用户的信息，判断用户是否已经登录过了
        Object attribute = session.getAttribute(LOGIN_USER);
        //如果用户没登录那就跳转到登录页面
        if (attribute == null) {
            return "login";
        } else {
            return "redirect:http://gulimall.com";
        }

    }

    @RequestMapping("/reg.html")
    public String regPage() {
        return "reg";
    }

    @ResponseBody
    @RequestMapping("/sms/sendCode")
    public R sendCode(@RequestParam("phone") String phone) {
        //1、接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (StrUtil.isNotBlank(redisCode)) {
            //活动存入redis的时间，用当前时间减去存入redis的时间，判断用户手机号是否在60s内发送验证码
            long currentCode = NumberUtil.parseLong(StrUtil.split(redisCode, "_")[1]);
            if (System.currentTimeMillis() - currentCode > 60000) {
                //60s内不能再发
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(), BizCodeEnum.SMS_CODE_EXCEPTION.getMsg());
            }
        }
        //2、验证码的再次效验 redis.存key-phone,value-code
        String code = RandomUtil.randomNumbers(6);
        String redisStorage = code + "_" + System.currentTimeMillis();
        //存入redis，防止同一个手机号在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, redisStorage, 10, TimeUnit.MINUTES);

//        thirdPartFeignService.sendCode(phone, code);
        return R.ok();
    }

    /**
     * TODO: 重定向携带数据：利用session原理，将数据放在session中。
     * TODO:只要跳转到下一个页面取出这个数据以后，session里面的数据就会删掉
     * TODO：分布下session问题
     * RedirectAttributes：重定向也可以保留数据，不会丢失
     * 用户注册
     *
     * @return
     */
    @RequestMapping("/register")
    public String register(@Valid UserRegisterVo vos, BindingResult result, RedirectAttributes attributes) {
        // 如果有错误则回到注册页面
        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            attributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }
        String code = vos.getCode();
        // 获取存入redis的验证码
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vos.getPhone());
        if (StrUtil.isNotBlank(redisCode)) {
            String realCode = redisCode.split("_")[0];
            if (realCode.equals(code)) {
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vos.getPhone());
                // 验证码校验通过后，调用远程服务注册
                R register = memberFeignService.register(vos);
                if (register.getCode() == 0) {
                    //成功
                    return "redirect:http://auth.gulimall.com/login.html";
                } else {
                    // 失败
                    HashMap<Object, Object> errorMap = MapUtil.newHashMap();
                    errorMap.put("msg", register.getData("msg", new TypeReference<String>() {
                    }));
                    attributes.addFlashAttribute("errors", errorMap);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            } else {
                HashMap<Object, Object> errorMap = MapUtil.newHashMap();
                errorMap.put("code", "验证码错误");
                attributes.addFlashAttribute("errors", errorMap);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        } else {
            HashMap<Object, Object> errorMap = MapUtil.newHashMap();
            errorMap.put("code", "验证码错误");
            attributes.addFlashAttribute("errors", errorMap);
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }

    @RequestMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes attributes, HttpSession session) {
        R login = memberFeignService.login(vo);

        if (login.getCode() == 0) {
            MemberResponseVo data = (MemberResponseVo) login.getData("data", new TypeReference<MemberResponseVo>() {
            });
            session.setAttribute(LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        } else {
            HashMap<String, String> errors = MapUtil.newHashMap();
            errors.put("msg", (String) login.getData("msg", new TypeReference<String>() {
            }));
            attributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }

}
